This is what I've come to thus far on a different forum:
It looks like it will just go back to looking like a typical cosine graph (which I guess is to be expected since 2/n and 1/n go to 0)
So if we set
Ok I think I broke my brain. Did any of that make sense? If it does, are the accumulation points for the set -1,0,1?
If it didn't make any sense (because I'm supposing it doesn't at this point, I've had a bit of a head cold all weekend), where should I actually be heading?